Carbureter.



W. OTTAWAY.

GARBURBTER.

APPLICATION FILED APR.I4, 1913.

yoflllinois, have invented certain new WILLIAM OTTAWAY, OF AURORA,ILLINOIS, ASSIGNOR TO AURORA. AUTOMATIC MACHINERY COMPANY, OF CHICAGO,ILLINOIS,

A CORPORATION 0F ILLINOIS.

CARBURET ER.

Specification of Letters Patent.

Patented Feu. 1e, 1915.

Application filed April 14, 1913. Serial No. 760,930.

To aU iff/1,0m it may concern.

Re it known that I, Winning OT'IMVAY, a citizen of the lnited States,and a resident of Aurora, in the county of Kane and State and usefulImprovements in Carbureters; and I do hereby declare that the followingis a t'ull.I clear, and exact description thereof, reference being hadtoY the accompanying drawings, and to the letters Vof reference markedVthereon, which form apart of this specification.

'lhis invention relates to carbureters and ymeans for conveyingcombustible fluid from the same to the cylinders of mnltiple-cylinderinternal [explosion motors, and more especially to the means whereby theintroduction of cmn'bustible fluid to each cylinder of the motor may beseparately regulated, so that firing will occur in each cylinder alike.or thc explosions in the various cylinders will occur with uniformityand regular-itiyaud in such a manner to obtain the highest degree of'ellicicncy;

The principal object of the invention is Yto provide a simple,economical and efficient carburetr and means for conveying andregulating the supply of combustible fluid from a carburetor or sourceof fluid supply to the cylinder or cylinders of an engine.

Other and further objects ofthe invention will appear' from anexamination of the following description and claims' and from aninspection of the' accompanying drawings.

The invention consists in the. features, crunbinations, and details ofconstruction herein described and claimed.

In the accompanying drawings, Figure 1 is a view in central verticalsection ot' a carburetor and head, manifold, or casing constructed inaccordance with my improvements', Fig. 2, a detail view in horizontalsection, taken on line? of Fig. 1 looking in the direction of the arrow,and showing a bottom view of. the branch or diverging tubes or -pipes ofthe head. manifold, or conduit-forming casing, including a tube formingan aJXiliary passage or `lyv-pass 'for conveying,T combustible fluid tothe cylinders of a motor, and the means'for controlling the effectualarea of the liv-pass; and Fig. il. a detail View in horizontal. section.taken on line 3 of Fig. 1. showing the tubular or sleeve valve mechanismand the inner casing or tube by which the tubular valve mech- -anisrn ofthe carburetor is surrounded.

In the accompanying drawings, my irnproved head, manifold, or means forconveying combustible fluid from a carburetor or source of supply to thecylinders of a multiple-cylinder internal. combustion motor is shown incombination with or so constructed as to form a part of a carburetormade in accordance with my invention described and shown in a pendingapplication Serial No. 745,318, filed January 31, 1913, for animprovement in carbureters.

In order to enable' this invention and the construction and mode. ofoperation of a device embodying the same to be readily understood so asto enable those skilled in the art to malte and use the invention, it.is here shown and will be described in con nection wiili a carburetorci' scribed and shown in said pe'fndin ration. lt will, lmwever. herend' stood by those skilled in the at that manifoldA or improved meansherein de scl'il'ied and shown, for corolla-ting the coin-- bustiolefluid or mixture i'iwrn the ririrff chamber or carburetor to thecylinders f i nulltiple-cylinder internal nomini: ion gine or motor isadapted to be used in nectioxi with any desired type or form ofcarbureteror device forinterinixing or sup plyiug hydrocarbons and airin such portions as to form a suitable comb fluid for use in connectionwith an im combustion engine or motor.

ln constructing a device in accordaxy with my nivention andimprovements, I prow vide a casing "f, having an inner tubular por--tion or inner casing walls 7) encircledI by the outer casing or wallsand forming therewith an annular float chamber c in which is .located anannular float d. The float shown in the drawings is in the form of ahollow, annular shell which encircles the inner casing portion and isencircled by the outer casing` U, and adapted tomove or fioat freelyupward and downward within the casing or float chamber'. )in annularbottom casing portion a. which may be made in one integral piece withthe outer casing portion or walls a., forms the main bottom of thecasing and float chamber and provided with an upwardly extending.screithreaded flange f in screwlhreaded engagement with the:'-:;rewthreaded bottom end 0f the inne: casving member or tube b, asshown in L A1 cover g Aof annularf colilistruction ncircles t e upperportion o t e casmg o'r tube member b and is secured theret'd 'and tothe outer casing member a in any suitable manner. Then per portion Itof" the inner casing or tube and upward beyond the cover member'g Vundis provided with outer screw threadsfasi# dicated in Fig. 1. Theimproved manifoldf induction device, conduit, or means for conductingcombustible fluid from the mixing chamber to the cylinders of h'motor,and which is hereinafter more particularly depro] ects throu Ascribed,is adapted to be secured to the carbureter by bem mounted in.threaded engagement with t e screw-threaded portion ft of the tubularmember b, or l5 other securing means of any desired,or inary ,or wellknown form. A.y feed tube n forming-a combustible fluid or h sage o, ismounted position to extendupwardly on vthe inside of the linner casingmember or tube 5 and is supported by means of a supporting member ,ortube body portion .having'radial arms hq`which are secured.n to theeasing bottom' e by means of screws r or other similar securing means.And` alc'asin bottom or' sub-bottom a having side wal portions t ismounted bneatl the annular casing bottom member e and lprovidedy with acentral aperture throu h which the lower end of the feed tu 4mayproject. The lower projecting end u; of the feed tube is provided withinne and,

outer screw threads, and a nut v is mounted in threaded engagement withthe outer screw threads of this ownwardly 'projecting end portion of thefeed tube and in su porting 40 engagement with the bottom mem r s so asto securely hold the tube and said bottom member in position and inrigid engagement @with each other. A plu 'a is mounted in threaded en aent wit the bottom end of the tube and orms aclosure for the same. Thebottom member s with its side walls t forms van air reservoir'passage orspace iy, and is provided with one or more air supp y paages zcommunicating with said space. A suitable screeu2 of vreticulatedmaterial or wire netting is mounted on the interior of the passage,reservoir, or compartment y in position to admit air to and excludedust, sand, grit, and other foreign substances from the interior of thecarbureter or mixing chamber. A hollow tubular'portion 3 is provided onone side of the casing having a passage 4 through the iimer wall thereof'l which communicates with the interior of the float chamber c, as shownin Fig. 1. .The upper end of this vertical, tubular pory,tion is closedby means of a plug 5. To the glwer end of the tubular portion 3 issecured acoupler member orvalve casing 6, the 'upper end'ofirbch is inthreaded engage- .droca'rbon supply pasnient with the tubular member 3,andl the lower ortion of 'which Ai's;jprovided with Ascrew t reads andadaptedjtb'be secured in threaded engagement with a'suitable cou lerxneinber or supply pipe connected wit a ,fgilource of hydrocarbon orcombustible fluid gh coupler member orvalve cas- "fpasfacentral, axialopening or` as- "Sileadng therethrough, and contro led by suitablevalve-mechanism com risin a :valve-operating lever 13, but Whic mec nismmay be of an desired suitablefform adapted 'to ermit t e valve tobe'i'aisedby means or' t e `float d and valve-operating lever when thihydrocarbon or combustible fluid bhconies suliiciently low in the Boatchamber the leverl -asto chamber is4 22 *which is covered by a screen23. This opening communicates with theinner" passage o inthe feed tubefn. by way of a passa 24 formed by a tube 25, one end of which isconnected with the feed tube n and the other end.l of which is connectedwith the bottom of the casing and il'oat chamber outlet 22 Yby means ofa coupler member-or. screened cap and pipe-connecting member 26. Thescreen-supporting cap 2 and pi 2 5 thus form a assage leading from. theoat chamber to t ej interior of the feed tube a. `The feed tube n isprovided at its upper 'end with a uidsupp'l `nozzle 27 havincombustible4 fluid sulpp passa es or nozz e assages 28 which eady from te passage o into the mixing chamber 38 of the carburetor.

A Athrottle valve, which is, by in -the form of a .butterfly valve tlmBoat to so operate y raise the valve. ,The Boat provided 'withan' outletopening so .j

preference, g 4, is rock-4 ingly moimted in the upper portion of the.casing upon a horizontal rock-shaft 35 which is journaled or rotatablysupported in the los casing (see Figs. 1 and2). This throttle valve'isadapted-to be operated or turned to open or closed or any desiredintermediate position to correspond with the speed of operation of themotor or engine in any desired, ordinary, or known manner and by meansof operating mechanism of any departs 48'Iand b w h air pa `communicateswith the air' 42 located below the level of the nozze and below themixin chamber 38, and is adapted to be'connec with vthe mixing chamberby auxiliary hihe speed air inlet openings hereinafterl` scribed. I A pMounted'on the inside of and withits .outer peripheral surface insliding engage- 120 space or air supplypassage 45 between said v tions.

which opening is 'formed by the lower open end of the tubular. valvebushing 43 when the member-49 is in raised position, or in the po "ionwhich it occupies .when the' throttle valve 34 is closed or when thedevice is operatingunder low-speed condi- (See Fig. 1.) The -iange .59is adapted to admit air through' the' opening when the endwise'movablevalve member 49 is lowered soA that lsaid flange is below and out ofengagement with Ythe lower. open 'portion of the valve bushing orrotatably mounted tubular valve member 43:' A bottom conical tubularportion 'or sleeve 39 upon and in fixed relation to the lower end of the.inner tubular valve member 49, forms a tapered` annular air supplypassage 41 leading from the air space 42 tothe mixing 'chamber 38 andWhiclr'is Vat all times open. The Avrotatably mounted; valve memberY orbushing-'43 is providedI with any desired number of auxiliaryllhigh-speedy air inlet ports 47, -as indicated-.in Fig. 3, andtheendposition 'whichi't occupies when the throttle(I wise .movable linnertubularV valve member 49 is provided with a corresponding number ofauxiliary high-speed air inlet openings or ports48 adapted tocommunicate with the ports47 when the throttle'valve 34 is in o )enposition, and the tubular valve miem er49 at one extremity \of itsmove-A mentfor instance, in its lowered position-- thus providingauxiliary air inlet passages leading throu h ports 47: and 48 from themain air supp y passage 45 into the mixing chamber-when the device is inoperation under high-speed conditions and the Athrottle valve 34 isopen. The rotative valve member or-.bushing 43 is also provided 'with aperipheral auxiliary air inlet opening 65, and theiinner valve bushingor member 49 with a corresponding peripheral auxiliary opening 66`forthe admission of low-speed `air or auxiliary air to be used when thedevice is ini operation under low-speed conditions, said openings beingadapted to register-or form an open auxiliary air inlet passage forlow-speed air when the openings or ports-47 and 48 for admittinghigh-speed air are closed, The openings and 66 are adapted to beclosedby the movement of the endwise movable valve/member 49 to the.

valveiiiis ope'ii or, in .other words, the device is in operation underhigh-speed ."conditions. An air inlet passa e 67 which is adaptedA tocommunicate wit the openings 65 and 66, when open, is provided with avalve 68 adapted to be adjustedl or operated by means of a thiimb nut69, or other suitable means, to any desired position for regulating theeffectual area of the opening 67 for admitting low-speed air. Thetubular rotative valve member 43 which is provided at its lower end withlaterally pro- 'iecting peripheral guiding lugs or arms 46 havin spacestherebetween for admitting incoming air to the space or passa e 45, isadapted to be rotated by means o anoperating stem or handle 50 to anydesired adjusted position, for regulating or changing the width of thehigh-speed auxiliary air passages formed bythe ports 47 and 48 and ofthd'low-speed air passages formed by the ports 65 and 66, in a directioncircumferentially of the tubular valve members 43 and 49.

The cylindrical valve member 49 is supported by a connecting rod orplunger 6l, the lower end of which is pivotally connected with saidcylindrical valve member 49 by means oi a horizontal pivot or shaft 62(see Fig. 1), and the upper end of which is operatively connected withthe throttle valve 34 by means of lu s 63 which are secured to the valve34,'an a horizontal pivot 64 mounted in said lugs and in pivotalsnpporting engagement with the plunger or connecting rod 61, or by anydesired suitable securing meanswhich may be of any ordi- `nary or wellknown form. The endwise movable valve member 49 is thus supported andadapted to be operated automatically with or by means of the throttlevalve 34 or simultaneously with. the manual operation of the throttlevalve, so as to open tho high-speed auxiliaryair inlet passages to thevmixing chamber 38 and close the lowyat speed air inlet ports when theend wise movable ,valvel member 49 fis in the position ,which itoccupies at one extremity of its movementf-for instancetin loweredposition-with the throttle valve open; Tt obviously follows that theauxiliary highspecd air inlet ports will be closed and the low-speed airinletY ports opened when the throttle valve is in closed position or thedeviceaoperating under rlow-"speed conditions. The regulation of theproportions ot liquid hydrocarbons and air admitted and inter-mixed may.thus be controlled by regulating or controlling thc admission of air,and the admission othigh-speed air and low-speed air through separate orindependent auxiliary inlet passages for such auxiliary high-speed airand low-speed air, respectively, may be regulated bv separatelyadjustable regulating or controlling means, so that the mixture orproportions of liquid hydrocarbons and air for high-speed condl" f tionsand for low-speed conditions, respectively, may be independentlyregulated, and may be varied with .respect to each other as desired byseparately adjustable means.

A carbureter constructed as above described is adapted to operate -asset forth in the pending application above referred to, to whichreference is made for a more detailed description of the device and thearrangement and operation of the parts above described. I.

A head, manifold, casing or conduitfii,- for conducting combustiblefiuid to the com'- bustion chamber of an engine or to each of thecombustion chambers or cylinders of a multiple-cylinder engine, isprovided and connected with the main casing or body a of the carbureter,which latter may, as already suggested, be of any desired, ordinary orknown type. The head, manifold or casing, when 1n the form shown in thedrawings, comprises in its construction a neck portion i and any desirednumber of branch pipes or casing portions y' and j which may be integralwith the neck z' or secured to said neck portion in any desired,suitable, or known manner, so as to form any desired number ofcommunicatin or diverging connected passages or branc passages 72 and 72all communicating with the main mixture outlet passage 71 formed by theneck or tubular portion z', and each leading to or adapted tocommunicate with a different explosion chamber or cylinder.

The opposite or diver 'ng ends of the tu` bular portions j and j o themanifold, head or casing are provided with suitable means for.connecting the passage or -passages formed thereby with the combustionchamber ork chambers, respectively, of an engine. ThisV connecting meansmay lconsist of a. pipe coupling l secured to each branch pipe j ory jand having internal screw threads m adapted to be secured in threadedlengagement with a. threaded pipe leading to acylinder of an' engine, orwith a-suitable connecting sleeve, nipple, or pipe union member. Thepipe coupling l for each of the branch tubular portions or branch pipes7' and j', respectively. is connected with the corresponding tubularmember j or j in any suitable manner, for instance, by being `mountedwith its tapered inner peripheral surface portion in engagement with anexbanded end portion n of the'tubular vmember or pipe. The casing orneck portion z' thus forms a main combustible fluid outlet -passage orinduction passage which communicates with the mixing chamber 38 and inwhich the throttle valve 34 may be mounted` as indicated in theaccompanying drawings. A single alve-controlled passage comprisingtheliassage 71 or passa .portions 71 a d 72 is of course sufficient' ora single cylin r motor, and may be used in connection with an auxiliarytube 73 or byass or passa 74 for conducting low-Spee com ustib e fluiddirectly from the .mixing chamber and provided with a regulatix deviceconstructed as hereinafter describ or adapted to be adjustedindependently of the main throttle valve which controls the highspeedcombustible fluid assage. The con nected but separate an distinctmixture outlet branch pasages or passage portions 72 and 72', however,are each adapted to lead to a different one of a plurality or series ofcylinders or explosion chambers of a motor which may be located atunequal diatances from the carbureter or combustible fiuidsupply, andwhich cylinders for thisl or any other reason may fire unequally or inan irregular manner unless the supply of combustible fluid passingthrough one o'g more of thev passages is regulated. In practice it isfrequently found that there is4 a lack of uniformity, strength, orregularity in the explosions in one or more chambers or cylinders, orrelativelyweak explosions in one or more cylinders as compared withothers,-more especially when operating at low-speed. It is thereforevery desirable to provide simple and efficient means whereby the supplyof combustible fluid to one or any lven number of explosion chambers orcylinders may be regulated or controlled by the main or throttle valve,or by regulating the effectual area of the outlet assage which iscontrolled by the main or throttle valve for both high-speed andlow-speed conditions of operation, and to provide, in connectiontherewith, suitable regulating means adapted to lbe adjustedindependently of the main or throttle valve, for regulatin and con:

trolling the supply of combustib e fluid for one or more othercombustion chambers or cylinders, and more especially to provide anumber of cylinders to.be supplied with'z combustible fluid fromJthecarbureter or' source of fluid supply with which 'the manifold or casing70 is connected.l A by-pass 74 is provided for one or anv given numberof branch passages 72, or for each branch pipe or branch inductionpassage in excess of a single branch passage or pipe, or for any branchpipe or induction passageleading to an explosion chamber which it isdesired to supply with a quantity of combustible iluid in excess of thatwhich is supplied by Way of the valvecontr0lled passage or through thelow-speed combustible fluid supply passage 34 in the valve 34 or otherform of passage which remains open for permitting the passage ofcombustible fluid past or through the throttle valve when the latter isclosed. Each by-pass or auxiliary passage il is, by preference, formedby a tube or auxiliary pipe 73, one end of Which communicates with theportion of the mixing chamber or of the mixture outlet passage 'il whichis located intermediate the throttle valve 3l and the air inlet passageor passages of the mixing chamber. if l1 auxiliary pipe or liv-pass tubeTil thus forms an auxiliary combustible fluid. discharge passage orby-pass 74 leading directly from the mixing chamber or the outletpassage of the mixing chamber and around or outward beyond the throttlevalve 34. into a portion 'of the mixture outlet passage or into a branchoutlet passage at a point be yond thel valve in the direction of theexplosion chamber and intermediate the throttle valve and the cylinderor combustion chamber with which such branch passage portion or branchpipe is to be connerted. Each tube 73. or by-pass 74, is provided withindependently adjustable means for regulating the effectual area ortransverse area of such passage, or bypass. as already suggested. Theregulating means here shown consists of a threaded adjustable regulatingscrew T5 mounted in threaded rngagement `with a suitable similarlyvthreaded support or boss 76 upon the corresponding auxiliaiy or by-passtube and in position to extend into the passage 74 formed by the tube.Thus, by turning the serre: in une direction the effectual area ortransverse area of the iiassage or by-pass formed by the tube isreduced, and by turning the screw in the opposite direction tbeeffectual area or transverse arca ot' the passage is increased to aufvdesired extent. limited onlj.r bjr the maximum size or urea of the passA screw seat or i'alve seat 7G in the portieri of cach tube opposite theside through which the screw extends adapted to admit and to tit closelyin er.- gagement with the end' of the screw when the latter is inpassage-closing position so that the ilow of fluid through the passagemay be entirely prevented. when desired.

From the foregoing it will be seen that the tube 7 3 forms an auxiliarycombustible fluid passage or by-pass leading from a mixing chamber ordischarge passage of thc carburetor intermediate the throttle valve andthe air inlet opening or openings of the mixing chamber, and that theauxiliary discharge passage or bypass thus formed is adapted tocommunicate with a combustion chamber or a passage leading to suchchamber, indelieudently of the position or operation of the throttle-ralve f The auxiliary passage thus formed b v the tube 73 is adapted toconduct from the mixing chamber any desired proportion of thecombustible fluid which is to be used when the device or the motorsupplied thereby in operation under low-speed conditions or when thethrottle valve is closed. rllhe reg ulating means or screw for theauxiliary passage or by-pass or for each one of any given number of suchbuv-passes, is adapted to enable the cllectual arca or flow oi combustible fluid through such auxiliary pas v jre or liv-pass or passagesto be controlled or regulated independently of the throttle valve. andthe throttle valve, when closed, is adapted to permit the passage of asufiicient quantity ofcombustible iluid to supply at least one cylinderfor operating at ovv-speed, so that no by-pass and no regu lating meansother than the valve is required to be employed between the mixingchamber and such last-mentioned cvlinder.

I claim: L

. ln a device of the class described. the' combination of a mixingchamber provided with a lurality of mixture discharge passages a aptedto communicate with the cylinders of an internal combustion engine, athrottle valve located intermediate of the mixing chamber and saidmixture discharge passages, and an auxiliary mixture discharge passagecommunicating at one end with the mixing chamber and at its other endwith one of said mixture discharge passages at a point intermediate thethrottle valve and the cylinder with which said pas sage communicates.

f2. In a device of the class described, the combination of a mixingchamber provided ivith a plurality of mixture discharge pasadapted tocon'imunicate with the cyl inders of an internal combustibn engine, athrottle Valve located intermediate of the mixing chamber and saidmixture discharge passages. an auxiliary mixture discharge passagecommunicating With said mixing chamber and one of said mixture dischargepassages intermediate of the throttle valve and the cylinder with whichsaid passage communicates, and a valve in said auxiliary mixturedischarge passage.

3. ln a device of the class described, the combination of a mixingchamber, provided with a plurality of mixture discharge passages adaptedto communicate with the inders ofan internal combustion engine, athrottle Valve located intermediate of the mixing chamber and saidmixture discharge passages, means for permitting a restricted amunt ofmixture to pass by said throttle valve when the same is in closedposition, and ai iliary mixture discharge passage communicating with themixin chamber and with one of said mixture disc arge pas sages,intermediate of the throttle valve and the cylinder with which saidpassage coinmunicates.

4. In a device of the character described, the combination of a mixingchamber provided with a plurality of mixture discharge passages adaptedto communicate with the cylinders of an internal combustion en 'ne, athrottle valve located intermediate o the mixing chamber and saidmixture discharge passages, means associated with said throttle valve,adapted to permit a restricted amount of mixture to pass by said valvewhen the same is in closed position, an auxiliary mixture dischargepassage communieating with said mixture chamber and with one of saidmixture discharge passa es intermediate of the throttle valve and t ecylinder with which the passage communicates, and a valve in saidauxiliary discharge passage.

5. In a device of the character described,

the combination .of a mixing chamber, a casing for a mixture outletpassage for said mixin clg'iamber and providedl with a plurality o?discharge openings, a plurality of branch pipes each connected with acylinder of an internal combustion engine, a throttle valve locatedintermediate of said pass tube. t

6, In a device of the character described,

the combination of a mixing chamber, a

casing formin a mixture outlet assage for said mixin c amber and provied with a plurality o? discharge openings, a plurality of branch pipeseach connected with a discharge openin and adapted to communicate with acy inder of an internal combustion engine, a throttle valve locatedintermediate of said casing and the mixing chamber, said valve beingprovided with an opening adapted to permit a restricted quantity of themixture to ass by the valve when the same is in close position, aby-pass tube communicating with the mixing chamber, and with one of saidbranch pipes, and an independently controlled valve in said bypass tube.

In testimony-that I claim the foregoing as my invention I aiiix mysignature in the presence of two witnesses.

WILLIAM oT'rawAY.

Witnesses:

C. H. GREENE, F. E. SPERRY.

